Joseph o



`1'. 0. MxCHAUD.'

INTERNALAEXPAVNDING BRAK.

APPLICATION FILED MAR. 5, 191s.

Patented'Ang. 19,1919.

* l 2 SHEETS-SHEET 2. v

`nivrriin vsA'rEs JosErH o. MICHAUD, oE rom1 KENT, MAINE.

INTEENAL-EXPANDING' BRAKE. y

To all whom t may concern." i

B e it known th'at I, J osErH a citizen of the United States, residing at .Fort Kent, `in the county of Aroostook and Statie of Maine, `have invented certain new and `useful.Improvements in Internal-EX- panding Brakes, of which aspeciication.

'This invention relates -to an improved internal expanding brake for motor, vehicles and has as its primary object to provide a Vconstruction wherein the brake shoes may be Y adjusted for takingup wear inthe brake linings The invention has as a further object to provide a brake wherein the brake shoes will be mounted upon a commony sup'portingpin therefor and wherein the said-pin will be connected with the rear axle housing of the vehicle by .an'improved attaching clip for the said pin.

A still further object of the invention is to provide an arrangement wherein washers or liners may be interposed between the inner1 ends of the brake shoes and the attaching clip. for spacing the shoes radially to take up wear in the brake linings, and wherein the pin will be adapted to carry a supply vvof the washers sothat. adjustment :of the brake shoes may be easily made atany time. And a still further object of the invention isv to provide a construction wherein the nate corresponding parts throughout the several views:

brake shoes will be equipped with improved bracket arms or plates to coact with the cam 'employed for actuatingfthebrake shoes.

` Other and incidental objectswill appear as the description proceeds. In the drawings v,wherein I have illustratedl the preferred embodiment of the invention, and wherein. similar reference characters 'desig- Figure 1 is a fragmentary plan View showing my improved brake in connection with the 'brake drum of ,one rear wheel ofa conf ventional typeof motor vehicle, certain 4of ofthe arrows, this view showing the normalv position of the brakeV shoes prior to the ad-' 5 6" `just-ment .thereof for taking up wear 1n the Specification of Letters Patent.

O. MICHAUD,

the following'is Patented aug.. 19, 1919.1 appxieationmea March 5,1918. serial No. 220,521; f

brake linings, as Well as the construction '1 of thejbrackets or plates employed upon the brake shoes to copeiate with the operating cam of the brake, and IFig. 3 is a fragmentarv sectional "view illustrating the manner in which the brake shoes are adjusted.

In order that the construction, mounting andv operation of mv improved brake may bev accurately understood I have, in the drawings, shown thev device in. connection withthe brake drum of one rear wheel of aconyentional type of motor vehicle. The wheel is indicated at 10. Connected with the wheel hub is a brake drum 11. One end .of the 12, andas usual, one of therear radius rods 13 is connected to this housing at'its adend of which vis mounted a cam 15 received within theA brake drum 11. Securedupon the outer end of the said shaft isa crank 16 to which is connected a4 brake rod 17. `Coming now more particularlv. to the subject of the present invention, I emplov companion substantially semi-circular brake shoes 18.4 These brake shoes are formed of suitable resilient metal and, up'on the outer sides thereof, are equipped with approved' brake linings 19, confronting the drum l1. At their inner ends,l the said .shoes are bent to provide confronting inwardly directed radial lugs- 20 and loosely fitted through bolt 21. This pin is double-ended to provide al common adjusting 4means for both of l the brake shoes and is threaded at its eX tremities to receive nuts 22. Interposed beT tween the said nuts and the lugs 20 of the #shoes are a plurality of-washers 23, The

purpose of these washers will `presently appear.

Engaging the pin or bolt 21 between the lugs 20 of the shoes 18 is an attachingcl'ip 24 for the said pin. This clip is preferably lformed from a strip of suitable resilient sheet metal bent into substantially U-shape to provide-parallel spring arms 25 and, -as will be observed upon particular reference 'to Fig. 1 of the drawings, these arms 'are varranged to embrace the pin 21 which is snugly' received within the bight of the clip. The clip is thus confronted at oppositesides v rear axle housinq'of the vehicle is' shown :atr v these lugs is -a chordal supporting pin yor i thereof by the lugs -2O of the shoes and consequently serves to space said lugs apart,

Loosely engaged through the ciip arms and extending through the rear axle housing 12 at the rear side thereof is an attaching bolt 26 disposed at substantially right angles to the pin 21 and, at its outer end, equipped with a nut 27. It will thus be seen that this nut is adjustable to clamp the clip 2st against the inner face ot the rear axlehousing for rigidly supporting the clip upon the said housing. Coincident with the adjustment of the nut 27 the arms 25 of the clip will be iiexed toward cach other to bindV the pin 21 within the bight of vthe clip. rilhe pin will, therefore,l also be rigidly connected` with the clip lfor firmly supporting the inner ends of the brake slices. The bolt 26, therefore, not only provides a means .for 'connecting the clip and consequently the biake shoes with the axle housing but also provides a means for adjusting the springr arms ot the clip to bind the pin Q1 in 'position upoii the clip.

At-their outer extremities, the brake shoes 18 are bent to provide confronting inwardly A directed radial lugs 28' and supported at their outer extremities by these lugs are cam engaging brackets or plates. TheseI brackets are formed with'arms 29' occupying the position of. a chord with respect to tlieb'rake.

' shoes and are secured at their outer extremi- 'ties by rivets or other suitable fastening devices to the inner sides ot the said shoes.

At their inner ends, the said arms are bent to provide laterally directed 'terminals or arms 30 extending radially outward between the lugs Q8 and riveted or otherwise secured thereto. As particularly shown in Fig. Q, thearms 30 ot" the brackets are thus arranged to confront opposite sides of the cam 15 and are curved longitudinally to tit. the opposite side faces of the c ain, normally engaging with the cam adjacentV their outer extremities@v Formed in the arms Q9 of the brackets are suitable openings and engaged these openings are. the terminals of a helical springfl acting to contract the brake shoes andnormallyhold the arnis 30 ot.

the brackets in engagement with the cam. Thus, it will vloe seen that when the rod l17 'is operated in the usual manner to rock the cam 15, the brake shoe'swill be expanded.

to engage the linings 19 of the said shoes with the brake drum. Upon vthe release of 1 l the said rod the spring 31 will 'immediately shift'the shoesaway from the drum. In this connection, it will be noted that when the cam is operated to spread the brake shoes, the cam' will ride over the curved faces of the arms 8O 'of the brackets with a minimum of friction so that any vtendency of' the cam to' shiftthe inner ends oi the brake shoes radially inward will be reduced vto a minimum. Furthermore., .the

shoes, a pin carried by said cliptand looselv rsi-tenia longitudinal curvature of the bracket arms' 30 will tend to support the brake shoes troni the cam'to uniformly hug the brake drum.

rttention is now directed to the fact that when the brake shoes are initially7 installed the clip 9A: is of a Width to support the said upthe wear` in the 'brake lining.' The purpose of the washers 23, therefore', now becomes apparent and it will be seen that the brake shoes may thus be readily adjusted to compensate` -for wear in the brake lining as such wear occurs. Furthermore, it will be seen that a suppl-y of washers, as shown in' Fig. 2, may normally be carried upon the pin 21, so that the brake shoes may be easily adjusted at any time desired,

it will, therefore.. be seen that l have provided a' particularly simple and ettlcient device may also be used with equal eiiiciency upon various other types of motor vehicles. Having thus described the invention,

-what is claimed as new is:

1. A-n internal expanding brake ineluding companion brake shoes, .an attaching clip disposed between adJacent ends ot the receiving the said end-s of the shoes whereby.

`washers may be inserted between the said ends of the shoes and the clip for spreading `the shoes with respect to each other, and

means for expanding the said shoes.

Q. An ,internal expanding brake including companionbrake shoes, a substantially Ushaped attaching clip, a pin received within the bight ot said clip and engaged with the adjacent ends of ,tlie'shoes the shoes being adjustable upon the said pinv for spreading the shoes with-'respect to each other, means engaging through the arms of the clip for supporting the dclip in act-ive position and vadjustable for clamping the clip aboutthe said pin, and `means 'for expanding the slices.

3.1An internal expanding brakeinclud ing companion brake shoes free at their outer ends, brackets carried by the outer ends ot said shoes and provided with arms directed between the outer ends of the shoes. means for contracting the slices, and means disposed between the arms of said brackets for expanding 'the shoes,the said bracket lconstruction for the purpose setI forth and lao arms being curved longitudinallyto fit the confronting sides of the said last mentioned means.

4. An` internal expanding'brake including companion. brake shoes, supporting'means therefor havingl the inner ends of the shoes w slid-ably engaged thereover, means having clamping engagement With the supporting .means and holding said supporting means fixed, .and means holding said shoe ends I against displacement. from the supporting means and operable to permit the adjustable spreading -of the shoes toward the ends o f said supporting means. y

5. An internal expanding brake including companion brake shoes provided at their in.-

ner ends with openings, supporting means forgthe shoes slpidably received through said openings, resilient means removably securshoes upon' said supporting means, attaching means for the supportingmeans.. and means for securing the attaching means in active position and adjustable to clamp the attaching means in engagement with the support' ing means.

7. An internal expanding brake including companion brake shoes, supporting means therefor. having the inner ends of the shoes slidably engaged thereov'er,`means holdingY said shoe ends against displacement from the supporting means and operableA to permit the spreading of the 'shoes upon said support-ing4 means, attaching means embracing the supporting means, and means'for securing the attaching means in active position and adjustable to clamp the lattaching means in binding engagement with the supporting means.

8. A n internal expanding brake including l 'companion brake shoes, supporting means therefor, and. liners normally carried in inactive position upon the supporting means, the liners being insertible beneath the inner ends of the-shoes in active `position for Vspreading the sh'oes. s 9.. An internal expanding brake including companion brake shoes,supporting means therefor having the inner ends of the shoes slidably engaged thereover, and liners re movably i'ttedupon said supporting means and normally carried inactive thereon, the linerslbeing insertible beneath the inner ends of ,the shoes upon said supporting means in acti-veposition for spreading the shoes.

. 10. An internal expanding brake including companion brake shoes, supporting means therefor having the inner ends of the shoes slida'bly engaged thereover, liners nor- ,mally carried inactive. upon the rsupporting means, and means carried by the sup-porting s means for holding the liners against dis- 'placement and vconnecting the inner ends of the shoes With the supporting means, the 'said last mentioned means being removable 'to'permit the insertion of the linersbeneath.,

the inner ends of the shoes in activel position for spreading the shoes.. f

ll.- An internal expandingbrake including companion brake shoes, supporting means therefor, liners normally carried inactive upon the supporting-means, and means holding the liners against displacement from In testimony whereofl alhx my signature in presence of two Witnesses. f

AJOSEPH O. MICHAUD. [L s]A Witnesses: i f i THos. D. Dnroun, GUsSIE E. PINKHANN.

A the supporting means, the liners being insertible beneath the inner ends of the shoes 1n active position for spreading the shoes. l 

